Box-cover lifter.



No. 874,043. PATENTED DEC. 17, 1907.

. R. L. TUDOR. BOX COVER LIFTER.

APPLICATION FILED DEC. 17, 1906.

sooner L. rnnon, or BUFFALO, NEW YORK.

BOX-COVER LIFTER.

Specification bf Letters Patent.

Patented Dec. 17, 1907.

Application filed December 17.1S06. Serial No. 3%.3651.

To all whom it may concern:

Be it known that 1, ROBERT L. TUDOR, a citizen. of the United States, residing at Buflnlo, in the county of Erie and State of New York, have invented a new and useful Improvement in Box-Cover Lifters, of which the following is a specification.

The obj not of this invention is to provide a simple, effective and inexpensive lifter for the covers of boxes in which shoe polish or other material is packed.

In the accompanying drawings: Figure 1 is at side elevation of a box for holding shoe polish or the like having its cover closed and provided will: my improved cover lifter. Fig. 2 is e. similzir view soo'wiiiig the cover of the box lifted on one side b my improved lifter preparatory to being w iolly removed therefrom. Fig. 3 a horizontal section in line 3 -3, Fig. 1. Fig. l is a vertical cross section in line 44, Fig. 1. mentory sectional views, on on enlarged scale, of the joint between the box end eover and the lifting device applied, showing differ-- ent positions of the some. Fig. '7 is e froguientary vertical section. showing my i: tion applied to s box having a. lightly differ ent head from that shown in F 4: and 8.

Similar letters of reference indicate co1respending parts throughout .he severnl views.

Although my invention is irpplicshle to various forms of boxes, toot shown in the drawings, as no example, is const ed of tin in rouudiorin and cons; i of o lo.. part or body A and on. upper part or cover B which ills with its marginal ill-intro l) orourul. the inn f 'nel ilnnge o of the body. At a. dis tance from the edge of the body the flange ol the letter is provided with an external annuler head or rih C with. which the edge ol the flange on the cover engages and'l'ormse stop for limiting themo'vomcnt of the cdver on the body upon closing the souls.

i) represents a rotary com or eccentric pivoted by means ol it rivet e on. the ihulge of the cover so as to turn in :2. plane parallel with the side of the box. In the closed position of the cam, its low or receding port is orrengod directly between the pivot of the coin and the bend C, as sh on in l igs. l and 4.. lfpon. turning the cam in the direction for on gaging its high or salient pwith the board directly opposite the pivot thereof the cover willbeliited from the body on. the 'pectivc sioe oi the box, shown in Figs. and G, by

Figs; 5 and 6 are frog the wedge action of the cam against the bead. 1 I

In order to enable the com to reliebly engage the bend in all positions of its turning movement, the cam is normally curved. in

the direction of its major axis so that it is concentricwvith-the body of the box in the inoperative position of the cam, as shown in Fig. 3. As the cam is turned from its inoperotiveposition, shown in Figs. 1 and 5 to its operative position shown in Figs. 2 and in, its outermost or free end is deflected upon riding over the swell or peripheral port of the box lying between the pivot e and the in- Werdly turned extremity of the cam. The resilience of theoam causes the free or selient end of the same upon swinging below thecover flange to reject inwardly undernesth the some and bear egeinstthe. heed close to the flange of the box,.thereby reducing the tendency of the cam to slip off from the flange and rendering the opening of the cover more reliable.

In order to positively prevent the cam from slippingoll' from the head and enable the some to obtain a firm and reliable been ing on the some, the upper side ol" this bead is so constructed as to form an annular Chill nel or groove f thereon. When turning the cam, its operative edge or periphery enters this groove and is confined against lateral movement relatively to the body, thus preventing slippege of the earn from said head and always insuring an ellecti've action of the some for lifting the cover from. the body. inasmuch as the bead having the annular groove extends all the Way around the body, it is immaterial what the position of the cover is, circuinferentially, relatively to the body in applying the cover thereto, because in all positions of the cover the 021.111 is l iosed by some portion of the bead and t 1e latter serves as an abutment which receives the thrust of the cam for opening the rover. lnsteed of providing the upper side of the head with a groove for the reception oi." the periphery of the cam, said head. may be flat on its upper side, as shown at f in Fig. 7, so as to present an abutment from which the com will not slip off as it would from a. head having a rounded upper side.

Various means may be provided for turning the cam but preferably that shown in the drawings which consists of a: handle or thumb piece 9 arranged at the upper edge of and its thumb piece are preferably stamped out of a single piece of sheet metal.

My improved cover lifter is exceedingly sim 1e in construction, its action is absolute reliable, its cost is very small and its apphcation to the box does not require any material departure from the standard type now in common use.

I claim as my invention: I

1. The combination of a box body having a circularside wall or flange, a box cover having a circular side wall or flange which fits over the edge of said body wall, an annular bead arranged on the outer side of the body wall and having a groovein its upper side, and a cam or eccentric pivoted on the cover wall and engaging with the groove of said bead, substantially as set forth.

2. The combination of a bgx body having its wall or flange provided with an annular bead, a cover fitting with its wall or flange over the wall of the body, and a cam or eccentric pivoted transversely on the wall of the cover and engaging its peri hery with said bead and curved concentrica ly with the Wall of the cover in the ino erative position of the cam or eccentric, sul istantially as set forth.'

3. The combination of a box body having a circular side wall or flange, a box cover having a circular side Wall or flange which fits over the edge of said body wall, an annular bead arranged on the outer side of the body wall and having a groove in its upper side, and a cam or eccentric pivoted trans-- versely to the wall of the cover and engaging its periphery in the groove of said bead and normally curved in the direction of its major axis so that in its inoperative osition the same is'concentric with the wal of the cover, substantially as set forth. Witness my hand this 11th day of December, 1906.

ROBERT L. TUDOR.

Witnesses:

THEO. L. POPP, E. M. GRAHAM. 

